[STEAM]COD:MW3 Problem

[Scratch.]

I was playing MW3 for some days without problems, I've played with MuIsBest and no problems at all but today every time I HIT/KILL someone i get "Error Server Connection Lost" I've tried to look for the error at Google but I had no luck at fixing the problem...

I've already deleted ClientRegistry.blob and started steam again but i had no luck. If someone knows a fix for this problem mind posting here please? Thanks

[Ron]

Try right click, properties, local files, verify game cache integrity.

[Scratch.]

Try right click, properties, local files, verify game cache integrity.

Already did that, worthless, Already had a 2 days chat with the Activision support from facebook and had a chat with Jess A. from the live chat of COD's website. tried to port-forward the ports they mentioned, but my router is an exclusive one from my ISP (Zon Hub 2.0) and its weird to port-forward, asking for help in the tech section. reinstalled the game, I'm going to format my computer in minutes. maybe the problem is located in my computer

[Ron]

Maybe an anti-cheat is kicking you?